February 2017 in “DOAJ (DOAJ: Directory of Open Access Journals)” Botulinum toxin type A did not help regrow hair in severe alopecia cases.
June 2024 in “Dermatology and therapy” Intramuscular injections improved hair density more than intradermal injections for treating hair loss.
December 2023 in “JPRAS Open” Botulinum Toxin A may help with hair growth and has some side effects; more research is needed.
3 citations,
January 2022 in “Neurotoxicity Research” Botulinum toxin may help reduce stress-related hair loss.
26 citations,
June 2006 in “Cephalalgia” Botulinum A toxin injections reduced pain and promoted hair regrowth in a woman with a rare form of alopecia areata.